The efficiency of the blast hole with a

square cross-section

«Drilling tool Bogomolov»

Drilling and blasting are one of the major processes in opencast mining.

Currently almost all blast holes at the quarry are drilled in cylindrical shape.

According to the analyzed researches the alternative method of conducting drilling and blasting operations.

Researches in drilling and blasting, laboratory tests on

the explosion of sand-cement blocks

The distribution of the fractions by weight depending on the shape of the cross section of the hole during sand-cement blocks blasting

Test resultOptimal granulometric composition of the exploded block was revealed while using wells with the square cross-section. A small yield of larger fractions indicates the best crushing.

The modeling of the explosion process in the mountain range by static

loading of the borehole walls with square and round cross-

section

The modeling of explosion of the round wells with a diameter of 216 mm with a grid of 5x6 m

The modeling of the explosion of the square holes with size 191 mm and a grid 5,5x6 m

Test result

NameGrid with

drilling and blasting, m

The safety factor for equivalent stresses

The volume of blasted rock mass, cubic meter

The bore of circular cross-section 5х6 0,117 2400

The bore of square cross section with a

larger grid5,5х6 0,068 2640

Appliance of wells with a square cross-section allows

To increase the volume of blasted rock mass by 10%.

To increase the yield of rock mass per one meter of the well by 10%.

To increase the size of the well grid by 10%.

To reduce the consumption of explosives in blasting operations by 10%.

To reduce the amount of drilling by 10%.

Archive of presentations

The efficiency of the blast hole with a square cross-section

The economic effect from the use of a blast hole with a non-circular cross-section

Forming wells with square cross section Development of modifications of the drilli

ng tool for boreholes with a square cross-section

Intellectual property project Results of the project team Drilling tool Bogomolov Investment proposal Project «Drilling tool Bogomolov»

Publications archive

Effective appliance of drilled wells with noncircular cross-sectional area during mine stripping at the open cast

Preconditions for creating and using a tool for blastholes forming at the open cast mining

Drilling tool for stress-raiser well drilling

Appliance and development of drilling tools with noncircular cross-section

Resource-saving drilling tools appliance for noncircular cross-section wells forming

Investment proposal «Drilling tool Bogomolov»

Thank you for your cooperation and understanding

Igor GolovinPhone: +7-921-435-13-44

E-mail: golovin-2017@yandex.ru«Drilling tool Bogomolov»http://golovin2017.com